Playing attachment for musical key instruments.



PATENTBD MAY 5, 1908 A. T. CHESTER. PLAYING ATTACHMENT FOR MUSICAL KEY INSTRUMENTS.

APPLICATION FILED NOV. 5, 1907.

"(g/3 ATTORNEY.

Cir

UNITED s rnrns PATENT curios.

ARTHUR 'lh-OHESTER, OF PELHAM MANOR, NEW YORK, ASSIGNOR TO'AlDOLIAN COMPANY,

" OF NEW YORK, N. Y., A CORPORATION OF CONNECTICUT.

PLAYING ATTACHMENT FOR MUSICAL KEY INSTRIHAENTS.

Specification 01 Letters Patent.

Patented May 5, 1908.

Application filed Novcmb 3r 5, 1907. Serial No. 100,796.

To all w/tom'it may concern."

Be it known that I, ARTHUR T. CHESTER, a

citizen of the United States, and a resident of bug Attachments for Musical Key Instruments, of which the following is a specification.

This invention relates to improvements in playing attachments for key musical instru merits and particularly to improvements in that class of instruments in which the ab stracts are actuated from motor pneuinatics by means of a suitable mechanical connection extending from the inotor pneumatic to the abstract.

T he object of my invention is to provide'a new and improved adjustable connection or power transmitting member extending from the motor pneumatic to the abstract and capable of neat adjustment so that all lost motion between the motor pneumatic and the abstract can be avoided and thus' greater accuracy, ellicieny and beauty ofplaying attained.

lo. the accompanying drawin s, in which like letters oi. reference indicate like arts in all the figures: Figure 1. is'a vertica transverse sectional view through, art of a piano playing attachment provide with my improvement. Fig. '2 IS a side view of the ad justablc piece to be attached to the motor pneumatic. Fig. 3 is an inner face view of the same. i

The key 1 is mounted in the conventional manner on the key bed 2 and its inner end is beneath the abstract 3 of the piano rnechan isni, which abstract rests in the conventional manner upon an adjustable head 4 at the in her end oi the key.

The abstract is provided with a toe 5 or lateral extension which rests upon a power transmitting or push rod, suitably guided and operated. by a motor meurnatic 7 of conventional construction, t 1e upper board of which pneumatic is secured to a valve chest 8 containing the valves as commonly provided for controlling such pneumatic and causing its collapsing by the exhaustion of the air.

hen the pneumatic is collapsed, the rod (5, being connected with the lower movable board oi the pncuiuatic, is moved upward and thus forces the abstract upward causing the corresponding string of the piano to be struck. If there is any space, even ii the same is extremely small, between the upper end of the rod 6 and the abstract there will be a certain irregularity in the playing on siccount of the lost motion and hence it is essential that the rod 6 shall be so adjusted that there will be absolu tcly no space between its upper end arid the corresponding abstract and consequently no lost motion. For the purpose of readily and easily acconiplislung such adjustinent'the lower end of the push rod'or connecting rod e is connected with a piece 9 pivotally connected with the inovable board of the bellows and for the pun pose of adjusting the pivoted piece 9, l provide a screw rod 10 suitably nounted on the outside of the bottom or movable board of the bellows. The angle piece 9 is pivoted between two lugs 11 projecting from the upturned end 12 of a metal strip '13 the'opposite end 14- of which strip is doubled over and bent to extend in. the reverse direction of the r end 12. A screw threaded hole is made in the doubled end 14 through which. hole the threaded portion oi the screw rod 10 is passed. This screw rod is suitably held on the under side of the movable board of the bellows by a clip .15 and the bent outer end 16 of the screw rod projects some distance beyond the bellows'ior facility in. operating. The plate or strip 18 is placed against the underside of the movable. board of the bellows at the swinging end of such board in such a manner that the bent-end 12 of the metal strip 13 rests against the end edge-of the board and the doubled apertured end 14 projects from. the under face of theinovable board. Ascrew 17 is passed through a suitable hole in the strip 13 into the underside of: the movable bellows board. The metal strip 1.3 with the angle piece 9 is pivoted thereon and the screw rod: 1.0 screwed into the doubled end 1e. can be assembled as an entirety for attachment to the bellows and afterthe'bellows have been securedin place it stra necessary to coin nect the lowerxend' of-the rod t: with the angle piece S). 'l he weight of the rod 6 presses down the angle piece, pressing one side or shank of thcsaine against the inner end of the screw 10. If the upper end of the rod 6 not in contact with. the underside of the abstract or its toe, it only necessary to turn the screw rod 10 in such manner that it moves lengthwise toward the angle niece. whereby the latter is swung up su t ly to I threaded piece secured on the pneumatic,

able member on the motor bring the up er'end of therod 6 in contact with the un erside of the abstract. jIfit is found that the rod 6 holds the abstract too high so that the latter cannot come in con tact with the button 4 on the key, all that is necessary is to turn the screw rod inreverse direction.

By this attachment a neat adjustment is readily'obtained, by simple and inexpensive means and without requirmg any change whatever in the construction of the motor pneumatic, its. valve chest or in the abstract. 1 v Y Having described my invention what I, F claim as new and desire to secure by Letters Patent is z 1. The combination with .a motor pneumatic. and an abstract, of anadjustable piece on the'motor pneumatic, motion transmitting means extending from said adjustable piece to the abstract and a rod mounted on the pneumatic to turn axially, one end of said rodbeing threaded and means at the opposite end of? said, rod for turning it an through which threaded piece the threaded part of the rod is screwed, said rod serving to adjust the adjustable piece on the pneumatic, substantially as.set forth. 2. The combination with a motorneumatic. and an abstract, of a pivoted a justable member on the motor pneumatic, at the swinging end of the movable board, a motion' transmitting member extending from said pivoted member to the abstract and means on.the motor pneumatic for adjustin the pivoted member substantially as set forth. 3. The combination with a motor neu-' maticand an abstract, of a' pivoted a justneumatic, at the swinging end of the movab e board, a motion transmitting member extending from said pivoted member to the abstract; a screw onthe motor pneumatic for adjusting the piv and perfect v" member extending from the pivoted piece to day of October A. D. 1907.

oted member which screw extends beyond the hinged end of the movable board of the pneumatic, substantially as set forth. I 1 4. The combination with a motor pneu:

' atic andan abstract, of a member hinged to the movableboard of the motor pneumatic at the swinging end of the same and a motion transmitting member extending from the pivoted member to the abstract, and a screwmounted on the movable board of the pneumatic and bearing with one end on the pivoted member, substantially as set forth.

5. The combination with a motor pneumatic, of a metal plate having aws at one end, and secured to the movable card of the motor pneumatic at the swinging end thereof, a piece pivoted in the jaws, a screw rod screwed through a hole in the metal plate,

the pivoted member resting against the end of said screw, and a motion transmitting the abstract, substantially as set forth.

'6. The combination with a motor pneumatic and an abstract, of a metulstrip-having its twoends bent in opposite directions, ,one end having two lugs and the other having'a threaded hole, said metal stri being secured to the under sideof the mova le board of the motor pneumatic at its swinging end and the endof themetal strip havin theaws resting against the end of the mova le board, a piece pivoted between the .jaws, a motion transmitting member extending from said piece to the abstract, and a screw secured through the threaded holein the other bent end of the metal strip, substantially as set forth. Signed at New York city in the county of New York and State of New York this 22nd ARTHUR T. cinzsrna.

Witnesses:

' A. W. SPENCE,

E. C. THOMPSON; 

